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% \renewcommand{\contentsname}{\centerline{\sanhao\heiti目\quad 录}}

%%%% 标题
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\renewcommand{\thesubsection}{\arabic{chapter}.\arabic{section}.\arabic{subsection}}%二级标题
\renewcommand{\thesubsubsection}{\arabic{chapter}.\arabic{section}.\arabic{subsection}.\arabic{subsubsection}}%三级标题

%%%% 图、表、公式
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\renewcommand {\thetable} {\thechapter{}-\arabic{table}}
\renewcommand {\theequation} {\thechapter{}-\arabic{equation}}
